diff --git a/crates/focale-app/CHANGELOG.md b/crates/focale-app/CHANGELOG.md
new file mode 100644
index 0000000..cb86f0c
--- /dev/null
+++ b/crates/focale-app/CHANGELOG.md
@@ -0,0 +1,30 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-app-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(decode)* read strip-based embedded previews and colour-manage thumbnails
+- instrument slider-to-screen preview latency
+- render sidecars with their stored pipeline version
+- *(app)* wire local AI segmentation masks into the editor
+- *(app)* desktop application and headless export CLI
+
+### Fixed
+
+- *(lint)* satisfy clippy 1.98 without restyling the frozen pipeline
+- *(app)* surface every failure and stop misreporting the display gamut
+
+### Other
+
+- retarget code citations to the split docs
+- Merge branch 'master' of github.com:Capsulsaurus/Focale
+- retire the PRD — architecture.md is the canonical spec
+- scaffold Rust workspace and development tooling
diff --git a/crates/focale-buildinfo/CHANGELOG.md b/crates/focale-buildinfo/CHANGELOG.md
new file mode 100644
index 0000000..c1f5e19
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+++ b/crates/focale-buildinfo/CHANGELOG.md
@@ -0,0 +1,18 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-buildinfo-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(sidecar)* record debug provenance (focale_version, focale_platform)
+
+### Other
+
+- retarget code citations to the split docs
diff --git a/crates/focale-cli/CHANGELOG.md b/crates/focale-cli/CHANGELOG.md
new file mode 100644
index 0000000..687fbc8
--- /dev/null
+++ b/crates/focale-cli/CHANGELOG.md
@@ -0,0 +1,24 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-cli-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(cli)* add bench-preview subcommand
+- render sidecars with their stored pipeline version
+- *(sidecar)* record debug provenance (focale_version, focale_platform)
+- *(segment)* local ONNX segmentation and cross-arch determinism CI
+- *(app)* desktop application and headless export CLI
+
+### Other
+
+- retarget code citations to the split docs
+- retire the PRD — architecture.md is the canonical spec
+- scaffold Rust workspace and development tooling
diff --git a/crates/focale-core/CHANGELOG.md b/crates/focale-core/CHANGELOG.md
new file mode 100644
index 0000000..16a9065
--- /dev/null
+++ b/crates/focale-core/CHANGELOG.md
@@ -0,0 +1,40 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-core-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(decode)* read strip-based embedded previews and colour-manage thumbnails
+- render sidecars with their stored pipeline version
+- *(app)* desktop application and headless export CLI
+- *(core)* wire v1 render orchestration and freeze regression golden
+- *(core)* implement v1 stages 7-10 (detail, retouch, geometry, finishing)
+- *(core)* implement v1 stages 3-6 (white balance, tone, colour, local)
+- *(core)* implement v1 mask rasterization
+- *(core)* declare v1 stage modules and preview scale contract
+- *(core)* add pipeline engine skeleton and gray plane; scaffold focale-export
+- *(core)* add colour-science module
+- *(core)* add rawshift-backed raw decode to linear camera RGB f32
+- *(core)* add working image buffer (interleaved RGB f32)
+- *(core)* add pipeline parameter and mask models
+
+### Fixed
+
+- *(lint)* satisfy clippy 1.98 without restyling the frozen pipeline
+- *(core)* route export-path transcendentals through pure-Rust libm
+- *(core)* flip WB tint sign to match the magenta-positive convention
+
+### Other
+
+- Merge pull request #18 from Capsulsaurus/feat/preview-latency-instrumentation
+- correct rawshift blocker claims and the macOS signing decision
+- retarget code citations to the split docs
+- retire the PRD — architecture.md is the canonical spec
+- scaffold Rust workspace and development tooling
diff --git a/crates/focale-export/CHANGELOG.md b/crates/focale-export/CHANGELOG.md
new file mode 100644
index 0000000..8367118
--- /dev/null
+++ b/crates/focale-export/CHANGELOG.md
@@ -0,0 +1,24 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-export-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(export)* implement deterministic export encoders
+- *(core)* add pipeline engine skeleton and gray plane; scaffold focale-export
+
+### Fixed
+
+- *(lint)* satisfy clippy 1.98 without restyling the frozen pipeline
+
+### Other
+
+- retarget code citations to the split docs
+- retire the PRD — architecture.md is the canonical spec
diff --git a/crates/focale-segment/CHANGELOG.md b/crates/focale-segment/CHANGELOG.md
new file mode 100644
index 0000000..3d78add
--- /dev/null
+++ b/crates/focale-segment/CHANGELOG.md
@@ -0,0 +1,23 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-segment-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(segment)* local ONNX segmentation and cross-arch determinism CI
+
+### Fixed
+
+- *(lint)* satisfy clippy 1.98 without restyling the frozen pipeline
+
+### Other
+
+- retarget code citations to the split docs
+- retire the PRD — architecture.md is the canonical spec
diff --git a/crates/focale-sidecar/CHANGELOG.md b/crates/focale-sidecar/CHANGELOG.md
new file mode 100644
index 0000000..075aa54
--- /dev/null
+++ b/crates/focale-sidecar/CHANGELOG.md
@@ -0,0 +1,22 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.1.0](https://github.com/Capsulsaurus/Focale/releases/tag/focale-sidecar-v0.1.0) - 2026-09-21
+
+### Added
+
+- *(sidecar)* record debug provenance (focale_version, focale_platform)
+- *(sidecar)* add v1 schema, atomic save/load, and golden-byte tests
+- *(sidecar)* add RFC 8949 core deterministic CBOR encoding
+
+### Other
+
+- retarget code citations to the split docs
+- retire the PRD — architecture.md is the canonical spec
+- scaffold Rust workspace and development tooling